Perhaps the reason vorinism teaches about futuresight being evil is due to what happened during/proceeding the 99th desolation. Maybe a truthwatcher, or Paliah himself, foresaw that if 9 heralds abandoned the oathpact, the desolations would stop for a time and they would be freed from their oaths. I can imagine that after coming to this realisation he went to some of his herald buddies and was like "Yo, this is wack, wanna bail?". The church would see this particular order of the KR as the ones that instigated the heralds to abandon humanity, and condemn them and their particular abilities. This condemnation would, over the years, be altered to what we see in the present era.